Waukesha County property records for 9 addresses on W Kostner Ct, New Berlin, WI · Last verified October 2026
| Properties | 9 |
|---|---|
| Median Sale Price | $225,000 |
| Deeds and Mortgages on File | 10 |
| Median Price per Sqft | $157 |
| Owner Occupied | 100% |
| Median Annual Tax Bill | $3,636 |
| Median Year Built | 1974 |
| Median Ownership Tenure | 10 years |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14525 W Kostner Ct |
3 bd · 1.5 ba · 1,350 sqft built 1972 · 0.239 acres | $3,804 2025 | Assessor Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14535 W Kostner Ct |
3 bd · 2 ba · 1,655 sqft built 1976 · 0.18 acres | $225,000 Sep 2009 | $4,217 2025 | Assessor + 1 Document Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14545 W Kostner Ct |
3 bd · 1.5 ba · 1,326 sqft built 1974 · 0.189 acres | $3,599 2025 | Assessor + 1 Document Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14555 W Kostner Ct |
3 bd · 1.5 ba · 1,322 sqft built 1973 · 0.189 acres | — May 1996 | $3,328 2025 | Assessor Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14565 W Kostner Ct |
4 bd · 1.5 ba · 1,924 sqft built 1975 · 0.21 acres | $255,000 Nov 2019 | $4,126 2025 | Assessor + 4 Documents Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14575 W Kostner Ct |
3 bd · 1.5 ba · 1,240 sqft built 1975 · 0.239 acres | $265,000 Aug 2020 | $3,344 2025 | Assessor + 3 Documents Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14585 W Kostner Ct |
3 bd · 1.5 ba · 1,344 sqft built 1975 · 0.23 acres | $213,000 Oct 2016 | $3,856 2025 | Assessor Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14595 W Kostner Ct |
3 bd · 1.5 ba · 1,225 sqft built 1972 · 0.21 acres | $193,500 Dec 2004 | $3,636 2025 | Assessor + 1 Document Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14605 W Kostner Ct |
3 bd · 1.5 ba · 1,310 sqft built 1973 · 0.23 acres | $190,000 Jul 2016 | $3,523 2025 | Assessor Updated Jul 2026 | 2 Owners on File Owner Occupied |